So I got this Adenium early spring and it was hard and plump. Two months ago I noticed a shrinking caudex. The plant is still hard so I assume it needs some water, but whenever I watered it a few leaves turn yellow. The soil is not soaked but moistened. So despite a few watering once every two or three weeks the plant caudex continues to slowly shrink, so my question is what could be the problem? Are the roots not absorbing water? Could it be root rot even when the caudex is not soft? It's hard to tell from the image but the top and side of the base area is starting to sink in.
